US9963325B2 - Enclosing frame, method for mounting an enclosing frame, and use of an enclosing frame for connecting a slewing tower crane to an object - Google Patents
Enclosing frame, method for mounting an enclosing frame, and use of an enclosing frame for connecting a slewing tower crane to an object Download PDFInfo
- Publication number
- US9963325B2 US9963325B2 US14/429,679 US201314429679A US9963325B2 US 9963325 B2 US9963325 B2 US 9963325B2 US 201314429679 A US201314429679 A US 201314429679A US 9963325 B2 US9963325 B2 US 9963325B2
- Authority
- US
- United States
- Prior art keywords
- surrounding frame
- crane
- tower
- accordance
- latching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
- B66C23/208—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided from the side, e.g. by walls of buildings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49616—Structural member making
- Y10T29/49623—Static structure, e.g., a building component
- Y10T29/49625—Openwork, e.g., a truss, joist, frame, lattice-type or box beam
Definitions
- the present invention relates to a surrounding frame which can be attached to a tower slewing crane and via which the tower slewing crane can be connected to an object such as a building.
- the invention furthermore relates to a method of assembling the surrounding frame at a tower slewing crane, and to a use of the surrounding frame for connecting a tower slewing crane to an object.
- the crane tower is typically surrounded by a so-called surrounding frame for this purpose which is connected to the crane tower without play and which can thus absorb the forces acting horizontally on the crane by direct contact.
- Anchorage braces which in turn connect the surrounding frame to the object and are anchored therein conduct the forces from the crane tower ultimately into the object.
- the surrounding frame comprises a U-shaped element which comprises a center section and two end sections and which surrounds the crane tower, which has a quadrangular cross-section, from three sides.
- the surrounding frame furthermore comprises a latching element which is supported in an articulated manner at the U-shaped element and which surrounds the crane tower at a fourth side in a closed position.
- the center section of the U-shaped element of the surrounding frame is frequently facing the object to which the tower slewing crane is to be connected so that the anchorage braces connected to the object can be fixed in the region of the center section of the U-shaped element.
- a crane which holds the surrounding frame at a suspension point and conveys it into an assembly position is used for assembling the surrounding frame for obvious reasons.
- the surrounding frame hangs perpendicular in the air in a transport position during the transport from a storage position which is located in the proximity of the crane, but remote from the assembly position, to an assembly position which is located at a specific height of the crane tower. Since, however, the assembly position requires a horizontal position of the surrounding frame, it is necessary to rotate the surrounding frame from the transport position by 90° into the assembly position and to position the surrounding frame in the now horizontal assembly position such that the crane tower is located within the U-shaped element.
- the surrounding frame can also already be held in a horizontal position on the transport to the assembly position. It is fastened to at least three points of the frame for this purpose. In this case, the suspension is admittedly more complicated to effect, but in turn, however, the rotation by 90° from the transport position into the assembly position is omitted.
- the surrounding frame which underlies this invention which can be attached to a crane tower of a tower slewing crane and which can connect the tower slewing crane to an object, for example to a building, comprises a flexurally stiff connection element and a latching element, wherein the connection element is provided in the form of an element which horizontally supports the crane tower in the anchorage plane at two outer sides.
- a bracket-shaped form of the connection element results here.
- bracket-shaped element instead of a U-shaped element has the meaning for the assembly that, on the positioning of the surrounding frame at the crane tower, two end sections of the U-shaped element cannot come to collide with the camera tower and have to be taken into account in a correspondingly complex manner in the positioning, as with the U-shaped element, but rather that only one section comparable to an end section has to be taken into account on the positioning. This represents a substantial simplification in the assembly of surrounding frames.
- the surrounding frame which advantageously comprises at least one auxiliary suspension section at which an auxiliary suspension can be attached via which the surrounding frame can be connected to the tower slewing crane, can now be brought more simply into the assembly position by means of this auxiliary suspension, since a collision with a second section, which is not present in accordance with the invention and which corresponds to an end section of the U-shaped element, is not possible.
- the auxiliary suspension can in this respect be provided in different embodiments. It can comprise a rigid element, e.g. a metal beam, or can also be present in a flexible embodiment. It is particularly advantageous in this respect for the auxiliary suspension to comprise a rope.
- An advantage of the auxiliary suspension comprises a good self-positioning of the frame during the letting down of the surrounding frame from an elevated position into the assembly position with a corresponding attachment of the auxiliary suspension.
- the auxiliary suspension contributes to a correct positioning, on the one hand, it is particularly advantageous, on the other hand, for the surrounding frame to comprise at least one support section at which the surrounding frame can be contacted by at least one support console in a horizontal position and can be fixed by it. This applies in particular in the assembly position.
- auxiliary suspension, support console and support section in conjunction with the bracket-shaped configuration of the connection element and with the corresponding selection of the suspension point of the surrounding frame thus allow a positioning of the surrounding frame into the assembly position which is simpler in comparison with the prior art.
- a latching element which comprises two latching bars which are connected to one another in an articulated manner and which are connected to the connection element in an articulated manner.
- the latching element in this respect surrounds the crane tower in a closed position, on the one hand, at the sides at which the crane tower is not surrounded by the connection element. In an open position, the latching element can be positioned, on the other hand, such that it is not an obstacle on the positioning of the connection element into the assembly position.
- the articulated design of the latching element furthermore allows a folding down of the latching element so that it can be provided in a space saving manner, on the one hand, and so that no additional connection step of the two latching bars to one another during the assembly process is necessary, on the other hand.
- a secure simultaneous transport of the latching element and the connection element that is the transport of the complete surrounding frame, from a storage position to an assembly position is possible.
- the latching element can in this respect be folded into the open position on the transport such that, on the one hand, the positioning of the connection element into the assembly position at a crane tower is possible and such that, on the other hand, the latching element can be folded simply by means of the articulated connections into the closed position and thus into the operating position on reaching the assembly position.
- At least one fastening section is provided at the bracket section to which fastening section at least one anchorage brace can be fastened which can be connected to the object.
- the connection of the at least one fastening section to the at least one anchorage brace ensures that the horizontal forces which act on the crane in all directions can ultimately be introduced into the building.
- the at least one fastening section comprises at least one opening as the anchorage geometry. It is thus conceivable with the aid of a corresponding anchorage geometry to fit the surrounding frame and here specifically its connection element into building corners or building projections which may be present in a building or to provide the anchorage geometry such that an oblique positioning of the crane toward the outer object side is made possible.
- At least one support section is provided at the connection element and at the latching element, the support section supporting the surrounding frame with respect to the crane tower and/or for at least one latching section to be provided for surrounding at least one corner bar of the crane tower between the at least one latching section, on the one hand, and the connection element and/or the latching element, on the other hand.
- This at least one support section can be manufactured from a material such as rubber which has a smaller hardness than the material resistant to pressure such as rubber, etc. of the crane tower and the surrounding frame and which thus ensures that damage to the corrosion layer is prevented which may be the consequence of a direct contact of the surrounding frame and the crane tower.
- the at least one latching section advantageously allows corner bars of the tower slewing crane to be reinforced.
- the invention furthermore relates to a method of assembling a surrounding frame in accordance with the invention to a tower slewing crane, wherein, in a first step the surrounding frame is connected to a crane suspension of a crane, in a second step, the surrounding frame is raised into an elevated position by means of the crane, in a third step, the surrounding frame is connected to the crane tower by means of the auxiliary suspension, in a fourth step, the surrounding frame is conveyed into an assembly position at the crane tower, and in a fifth step, which is a latching step, the latching element is brought from the open position into the closed position.
- the present invention is furthermore directed to a use of a surrounding frame in accordance with the invention for connecting a tower slewing crane to an object.
- FIG. 1 shows the assembly situation at the start of the fourth step of the assembly process with the surrounding frame in an elevated position
- FIG. 2 shows the assembly situation at the start of the fourth step of the assembly process with the surrounding frame in the assembly position
- FIG. 3 shows a plan view with the crane tower, the surrounding frame and the building
- FIG. 4 shows the assembly situation at the start of the fifth step of the assembly process, with the surrounding frame being in the assembly position and with the latching element being in the open position;
- FIG. 5 shows the surrounding frame at the end of the assembly process and in the operating position, with the latching element being in the closed position
- FIG. 6 shows the surrounding frame with four latching sections.
- FIG. 1 shows the fourth step in the assembly of the surrounding frame 1 in accordance with the invention at the crane tower 5 , wherein the surrounding frame 1 is in an elevated position.
- a crane suspension 10 and a corresponding crane (not shown) are connected to the surrounding frame 1 and the surrounding frame 1 is raised by the crane.
- the surrounding frame 1 is then connected to the crane tower 5 via the auxiliary suspension 8 and the auxiliary suspension section 9 .
- the surrounding frame 1 is now brought into or close to the assembly position on the letting down in accordance with the arrow P.
- the auxiliary suspension 8 is in this respect fastened to the crane tower 5 such that a force acting via it onto the support frame 1 on the letting down of the surrounding frame 1 brings the latter into the desired position or into the proximity of the desired position.
- FIG. 2 shows the surrounding frame 1 after it has been brought from the elevated position into the assembly position.
- the auxiliary suspension 8 and the support console 11 are arranged such that the surrounding frame 1 is held in the desired assembly position by them.
- the surrounding frame 1 is in a horizontal position, which is made possible in that the crane suspension 10 engages at a corresponding position 15 at the surrounding frame 1 .
- the horizontal position of the surrounding frame 1 can therefore be made possible by the corresponding positioning of the surrounding frame 1 at the auxiliary suspension 8 , at the support console 11 and at the crane suspension 10 .
- FIG. 3 shows the surrounding frame 1 in accordance with the invention in the operating position.
- the side of a building is shown as an object to which the surrounding frame 1 can be fastened.
- an assembly step shown in FIG. 1 in which the surrounding frame 1 is placed laterally and from above at the crane tower 5 is not possible in this manner with a U-shaped surrounding frame corresponding to the prior art.
- the end section of the U-shaped element which is first incident on the crane tower in the surrounding frame known from the prior art, would collide with said crane tower and would make a swinging in accordance with the invention impossible.
- FIG. 4 shows a sectional view of a surrounding frame 1 and of a crane tower 5 in the assembly position.
- the situation shown corresponds to the fifth step of the assembly process. It can be seen in this respect that the connection element 2 is connected to the crane tower 5 via the support sections 4 .
- the latching element 3 in this respect does not contact the crane tower 5 , but is rather in an open position. As the arrow K illustrates, it can be folded into a closed position due to its articulated connection.
- FIG. 5 shows a sectional view of a surrounding frame 1 and of a crane tower 5 in the operating position. It can be seen in this respect that the latching bars 6 were folded such that the surrounding frame 1 now surrounds the crane tower 5 and is in contact therewith via the support sections 4 .
- the two latching bars 6 are connected at least two connection sections 12 to the connection element 2 in the operating position and are located in the closed position.
- a plurality of fastening sections 7 are provided at the connection element 2 .
- three fastening sections 7 are shown each having two or four openings 13 as the anchorage geometry for the fastening of the anchorage braces 14 .
- any desired number of fastening sections 7 and anchorage geometry of any desired design can be provided.
- FIG. 6 shows four latching sections 16 which can be connected to the connection element 2 and to the latching element 3 to reinforce the corner bars such that the crane tower 5 or its corner bars are surrounded between latching sections 16 , on the one hand, and the connection element 2 and/or the latching element 3 , on the other hand, and are thereby reinforced.
- a substitute tower reinforcement can hereby be achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jib Cranes (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012018524.3A DE102012018524A1 (de) | 2012-09-19 | 2012-09-19 | Umfassungsrahmen - Verfahren zum Montieren eines Umfassungsrahmens - Verwendung eines Umfassungsrahmens zum Verbinden eines Turmdrehkrans mit einem Objekt |
DE102012018524 | 2012-09-19 | ||
DE102012018524.3 | 2012-09-19 | ||
PCT/EP2013/002821 WO2014044395A1 (fr) | 2012-09-19 | 2013-09-19 | Encadrement, procédé de montage d'un encadrement et utilisation d'un encadrement pour relier une grue pivotante sur pylône à un objet |
Publications (2)
Publication Number | Publication Date |
---|---|
US20150225211A1 US20150225211A1 (en) | 2015-08-13 |
US9963325B2 true US9963325B2 (en) | 2018-05-08 |
Family
ID=49253247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/429,679 Active 2035-01-07 US9963325B2 (en) | 2012-09-19 | 2013-09-19 | Enclosing frame, method for mounting an enclosing frame, and use of an enclosing frame for connecting a slewing tower crane to an object |
Country Status (7)
Country | Link |
---|---|
US (1) | US9963325B2 (fr) |
EP (1) | EP2897891B1 (fr) |
DE (1) | DE102012018524A1 (fr) |
ES (1) | ES2603393T3 (fr) |
RU (1) | RU2615229C2 (fr) |
SA (1) | SA515360171B1 (fr) |
WO (1) | WO2014044395A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109928308A (zh) * | 2017-12-19 | 2019-06-25 | 广东庞源工程机械有限公司 | 一种可调节的附墙框固定装置 |
RU2759162C1 (ru) * | 2021-04-28 | 2021-11-09 | Публичное акционерное общество "Федеральная гидрогенерирующая компания - РусГидро" | Способ автоматизированного монтажа внешнего ограждения гравитационного накопителя энергии и система для его реализации |
CN115973932B (zh) * | 2022-12-06 | 2023-06-20 | 中建二局第三建筑工程有限公司 | 一种尺寸可调的通用型抱箍式塔吊附着支座及其施工方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2803865A1 (fr) | 2000-01-18 | 2001-07-20 | Bouygues Batiment | Ancrages de grue a tour ou de pylones |
JP2005112518A (ja) | 2003-10-06 | 2005-04-28 | Ps Mitsubishi Construction Co Ltd | タワクレーン |
KR20060105938A (ko) | 2005-04-02 | 2006-10-12 | 주식회사 아이엘엔지니어링 | 타워크레인용 보강장치 |
KR100825255B1 (ko) | 2006-11-20 | 2008-04-25 | 케이엔에프중공업주식회사 | 타워크레인용 보강장치 |
JP2010006481A (ja) | 2008-06-24 | 2010-01-14 | Ihi Transport Machinery Co Ltd | クレーンの免震支持装置 |
JP2011241084A (ja) | 2010-05-20 | 2011-12-01 | Ohbayashi Corp | 壁つなぎ装置及び壁つなぎ装置の取付方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1041497A1 (ru) * | 1982-04-22 | 1983-09-15 | Всесоюзный Научно-Исследовательский И Проектный Институт "Теплопроект" | Устройство дл креплени башни строительного крана к возводимому сооружению |
-
2012
- 2012-09-19 DE DE102012018524.3A patent/DE102012018524A1/de not_active Withdrawn
-
2013
- 2013-09-19 RU RU2015114521A patent/RU2615229C2/ru active
- 2013-09-19 US US14/429,679 patent/US9963325B2/en active Active
- 2013-09-19 WO PCT/EP2013/002821 patent/WO2014044395A1/fr active Application Filing
- 2013-09-19 EP EP13766896.8A patent/EP2897891B1/fr active Active
- 2013-09-19 ES ES13766896.8T patent/ES2603393T3/es active Active
-
2015
- 2015-03-19 SA SA515360171A patent/SA515360171B1/ar unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2803865A1 (fr) | 2000-01-18 | 2001-07-20 | Bouygues Batiment | Ancrages de grue a tour ou de pylones |
JP2005112518A (ja) | 2003-10-06 | 2005-04-28 | Ps Mitsubishi Construction Co Ltd | タワクレーン |
KR20060105938A (ko) | 2005-04-02 | 2006-10-12 | 주식회사 아이엘엔지니어링 | 타워크레인용 보강장치 |
KR100825255B1 (ko) | 2006-11-20 | 2008-04-25 | 케이엔에프중공업주식회사 | 타워크레인용 보강장치 |
JP2010006481A (ja) | 2008-06-24 | 2010-01-14 | Ihi Transport Machinery Co Ltd | クレーンの免震支持装置 |
JP2011241084A (ja) | 2010-05-20 | 2011-12-01 | Ohbayashi Corp | 壁つなぎ装置及び壁つなぎ装置の取付方法 |
Non-Patent Citations (2)
Title |
---|
German-language Written Opinion (PCT/ISA/237) dated Nov. 4, 2013 (five (5) pages). |
International Search Report (PCT/ISA/210) dated Nov. 4, 2013, with English translation (six (6) pages). |
Also Published As
Publication number | Publication date |
---|---|
EP2897891B1 (fr) | 2016-08-17 |
WO2014044395A1 (fr) | 2014-03-27 |
SA515360171B1 (ar) | 2018-06-27 |
RU2615229C2 (ru) | 2017-04-04 |
DE102012018524A1 (de) | 2014-03-20 |
ES2603393T3 (es) | 2017-02-27 |
US20150225211A1 (en) | 2015-08-13 |
RU2015114521A (ru) | 2016-11-10 |
EP2897891A1 (fr) | 2015-07-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES2389952T3 (es) | Encofrado de vigas maestras con desencofrado automático del tablero inferior | |
US9963325B2 (en) | Enclosing frame, method for mounting an enclosing frame, and use of an enclosing frame for connecting a slewing tower crane to an object | |
KR20180100604A (ko) | 풍력 발전 설비의 구성요소를 들어올리기 위한 리프팅 장치 및 풍력 발전 설비의 구성요소들을 조립하기 위한 방법 | |
CN105888229A (zh) | 全钢附着式脚手架安装方法 | |
EP1878850A2 (fr) | Système d'échafaudage | |
NL2010554C2 (en) | Crane with connector for erecting a structure. | |
US10570631B2 (en) | Diagonal reinforcement for support structures for floor formwork and method for mounting same | |
US9914386B2 (en) | Load bearing rail and tie-down ring assembly | |
JP6046337B2 (ja) | 外壁パネルの吊り上げ方法 | |
CN106801660B (zh) | 用于安装风力发电机的叶片的方法及设备 | |
KR20150060069A (ko) | 조립식 비계장치용 고정부재 | |
JP5791743B2 (ja) | 建築用パネルの輸送用支持材及び建築用パネル | |
CN107827003B (zh) | 用于稳定起重机的设备 | |
JP2010208859A (ja) | タワークレーン用架台、タワークレーンの支持方法、タワークレーン用架台の取付構造 | |
KR102399980B1 (ko) | 회전 및 탈부착이 가능한 고박 장치 | |
KR100825186B1 (ko) | 안전망 설치틀 | |
JP2006249742A (ja) | 鉄筋篭建て起こし方法 | |
CN211942912U (zh) | 一种驾驶室车窗防护网结构 | |
CN220578789U (zh) | 一种塔式起重机高度提升装置 | |
JP5498330B2 (ja) | 建築用パネルの輸送用支持材及び建築用パネル | |
CN103071989B (zh) | 塔机起重臂分段安装方法及其辅助安装撑杆 | |
CN115258042A (zh) | 一种用于双燃料船舶的透气桅 | |
JP2007153555A (ja) | 重量資材の吊下補助装置 | |
JP6118391B1 (ja) | エレベータの乗りかご | |
KR20090025491A (ko) | 안전망 설치틀 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LIEBHERR-WERK BIBERACH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MAYER, JOACHIM;REEL/FRAME:036701/0298 Effective date: 20150902 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |